Piston



Jan. 19 1926.

D. E. CLAYPOOL PISTON Filed Nov. 24, 1922 UNITED STATES PATENT OFFICE.

DANIEL E. CLAYPOOL, OF FORLL WORTH, TEXAS.

PISTON.

Application filed November 24, 1922.

To all whom it may concern:

Be it known that I, DANIEL E. CLAY- rooL, a citizen of the United States, residing at Fort Worth, in the county oi T arrant and State of Texas, have invented certain new and useful Improvements in Pistons, of which the following is a specification.

My invention relates to pistons and more particularly to pistons for gas or gasoline engines or engines using explosive torce: and the o-hjcct is to improve the itructi-fin ot pistons and to provide pistrms which have no openings in the side wall or 'eriphery so that there will be nothing on the piston to score the cylinder walls. The object is to provide connections entirely on the inside of the piston for the crank arm connection. The advantage of this construction is that it eliminates two extra bearings for the working parts which frequently cause hammering or pounding in the cylinder. .inothcr object is to provide open-ended hollow pins for making. connection of the crank or piston. arms with the pistons and to provide INCH-11S for oiling the crank or piston arm connection anton'iatically from the piston oiling: system. Other objects and advantages will be fully explained in the tollowing description and the invention will bemore particularly pointed out in the claims.

Reference is had to the accoinpanyinit drawings which form apart oi this appli ation.

i is a vertical section of the piston throiigh the connecting pin. Fig. is a vertical section of a piston at right angles to the view shown in Fig". 1 the lower bean m coin ins; member tor the connecting pin being omitted, the wank arm being shown engag ing the pin and a portion of the pin being; shown in section. Fig. 3 a bottom plan view oi? the piston, the crank arm being; shown in section. Fig. 4; is a bottom plan view with all detachable parts omitted.

Similar characters of reference are used to indicate the same parts throughout the several views.

A piston 1 is shown with three piston Serial No. 602,921.

ring grooves 2, 3, and 4. There are no openings through the periphery of the pis ton shirt for a crank arm connection. Bear ings for the crank arm connections are provided within the piston. The upper or interior bearing members 5. are cast integral with the piston wall and on each side the hearing members 5 are thick enough to receive studbolts 6. The lower or outer bearing members 7 are bolted to the interior hearing members 5 by .means of bolts ('5. The connecting; pin 8 is preferably made hollow for carrying a supply of lubricating material for lubricating the crank arm connection. The pin 8 is supplied with oil from the groove 4: in the periphery of the piston. Ducts 9 are made from the groove t to the hollow end of the pin 8. An aperture 10 approximately at the central part of the pin, is provided so that lubricating material may be fedto the connection 11 of the crank arm. The bearing members 5 are strenothci'ied by integral ribs or webs 12. Holes 12% are made in the bearing monibcrs 5 for the bolts 3. After the pin 8 has been secured in the hearings, the bolts (3 are prevented from turilii'ip; by wires l-i which are run through the heads 6, as shown in Figs. 1 and 3. The heads (3 have each a plurality of holes 15 so that there will be holes for the wi or rods l l when the bolt heads are turned to different positions.

l hat I olain'i .is:-

A piston having a head provided with annular grooves for piston rings and a skirt having an unbroken periphery and bearing; members wholly within said piston the upper part of the hearing being integral with the skirt, and a hollow open ended pin having an aperture through its wall intermediate its ends and held in place by said bearing members and. having its ends pro jecting in close proximity to the walls of the piston, and said piston having oil ducts leading from the lowest groove to the open ends of said pin.

In testimony whereof, I set my hand, this th day of November, 1922.

DANIEL E. CLAYPOOL. 

